Lodash is a JavaScript library that works on the top of underscore.js. Lodash helps in working with arrays, strings, objects, numbers, etc.
The _.isSafeInteger() method is used to find whether the given value is a safe integer or not. It returns True if the given value is a safe integer. Otherwise, it returns false. An integer is safe if it’s an IEEE-754 double-precision number(all integers from (2 53 – 1) to -(2 53 – 1)) which isn’t the result of a rounded unsafe integer.
Syntax:
_.isSafeInteger(value)
Parameters: This method accepts a single parameter as mentioned above and described below:
-
value: This parameter holds the value to check.
Return Value: This method returns true if the value is a safe integer, else false.
Note: Here, const _ = require(‘lodash’) is used to import the lodash library into the file.
Example 1:
// Requiring the lodash library  const _ = require("lodash");         // Use of _.isSafeInteger() method   // Passing a mathematical pow function as an argument console.log(_.isSafeInteger(Math.pow(2, 53) - 1));   // Passing a maximum value of a number as an argument console.log(_.isSafeInteger(Infinity));   // Passing a minimum value of a number as an argument console.log(_.isSafeInteger(Number.MIN_VALUE)); |
Output:
true false false
Example 2: Â
// Requiring the lodash library  const _ = require("lodash");         // Use of _.isSafeInteger() method   // Passing a positive number as an argument console.log(_.isSafeInteger(123));   // Passing a negative number as an argument console.log(_.isSafeInteger(-123));   // Passing a number(with decimals) as an argument console.log(_.isSafeInteger(0.123)); |
Output:
true true false
Note: This code will not work in normal JavaScript because it requires the library lodash to be installed.
Reference: https://lodash.com/docs/4.17.15#isSafeInteger
